Reinforced concrete column.



PATENTED JAN. 15, 1907.

L. F. SMITH. REINFORCED CONCRETE COLUMN.

APPLICATION FILED 0GT.3. 1906.

2 SHEETS-SHEET 1.

Witness L. F. SMITH. REINFORCED CONCRETE COLUMN.

APPLICATION FILED 0GT.3, 1908.

PATENTED JAN. 15, 1907.

2 SHEETS-SHEET 2.

1135 Emma LAYTON F. SMITH, OF BALTIMORE, MARYLAND.

REINFORCED CONCRETE COLUMN.

Specification of Letters Patent.

Patented Jan. 15 1907.

Application filed October 3, 1906. Serial Nc. 337i188.

To all wiwnt it may concern.-

Be it knownthat I, LAYTON F. SMITH, a citizen of the United States, residing at Baltimore, in the State of Maryland, have in' vented'certain new and useful Improvements in Reinforced Concrete Columns, of which the following is a specification. V

his invention relates to improvements in reinforced concrete construction, and has particular reference to the construction of columns, the distribution of load of columnrods to concrete, and the connection between the column and beam.

The object of the invention is to provide a construction whereby the column-rods may be sustained in a socket or shoe Whose base has an area equivalent to ratio of stress in the steel and concrete, so as to distribute the load in the rods over the concrete base.

In practicing the invention it is immaterial just where these socket or shoe members are situated, as it may be located'in the footing of the column or at the column-and-beam connection or it may be at any point Where two column-rods join.

Examples of the application of the invention are illustrated 1n the accompanying drawings, in which Figure 1 shows asectional elevation of a column, the footing or foundation-base of the column, and the connection between-the col-I mum and girder or beam, all of which areprcvided with my improved constructions. Fig.

2 is a'perspective view of one form of lower. socket member. 1 Fig. 3 shows a detail of one of the upper socket members. Figs. 4 and 5 illustrate plan and cross-sectional views of a socket membercircular in form. Figs. 6 and 7 show similar views of a single socket. 8 and 9 show two views of a double-socket member. Fig. 10 illustrates a socket baseplate and a tubular socket attached thereto y means of screw-threads; and Figs. 11 and.

12 show the lower ends of a column-rod fiattened out and bent to increase the base area whereby to form a flat support for the rod.

. In a reinforced concrete column if it is considered that the steel rods carry a definite amount of. load that load should be distributed over the concrete in the footing or foun-j dation by increasing either the area or the rod at the resting-point or by providing a socket or shoe which must have an [area equivalent to the ratio of compression allowed in the two materialsto wit, steel and concrete. If the ratio of fifteen is allowed,

Figs

then the resting-point of the rod. or the socket in which the rod rests should have an area fifteen times as great asthe area of the steel rod.

By my invention I have provided a con-' venient construction whereby the distribu tion of the load of the column-rods to. the

concrete is eflected. v

Referring to the drawings, the numeral 1 designates the footing, and 2 thecolumn ris which latter may be formed in variousway's, several examples of which are shown 1n the accompanying drawings.

i The socket member shown the footing of the column in Fig. 1 and also in detail in Fig.

2 comprises a base-plate 5, having tubular sockets 6, projecting vertically from the upper side thereof. In this form thebase-plate is provided with four tubular sockets, oneat' each corner thereof; but it is obvious that the plate may be of any desirable shape in outline and also be provided with as many sockets asdesired to conform to-the character'of the column needed. Ilhetubular sockets 6 may project from the base-plate for any'de sired distance in order that the lower ends of the column-rods may be; pronerlyinc'losed. I

The length of these tubes therefore may be varied to suit the requirements many special case, but the chief object in all cases being to 1 provide a broad flat-base for the endof each column-rod to rest upon. when embedded in the concrete, so as to distribute or; transfer the load from the rod to the concrete. v

' The tubular sockets maybe 'formedl'mte grally with the base olate 5, orthe base-plate may be provided withafscrew thread'ed're socket may screw, 'a'sseen-i'n Fig. 10.

It will beunderst'ood' that the socket mam bers may be employed either at the footing or base of the column or at any point where two column-rods j-oiny Forexam le, by reference to Fi 1 it will be not that the lowermost co uinn-rods '7 extend vertically from the footing 1 up to the first beam or rder 10. This beam or girder may be reinupper ends of the column-rods 7 terminate I 1 00' 065s nto which athre'add ends ofiwhel' I 1 1C orced in any desired manner; but where'the provide a socket member 11,comprising a base-plate with tubular sockets 12, projectmg from the bottom of the base-plate, so as to receive the upperends of said lower column-rods 7. This socket member 11 is also provided with tubular sockets 13, which project from the-upper side of the base-plate and which receive the lower ends of the columnrods 14, which project from the'beam or girder u wardly. It will thus be seen that this soc et member 11 forms a connection between the lower and upper column-rods 7 and 14.

VVherea plurality of tubular-sockets are provided on a single base-plate, l preferably provide openings 15 insaid plate in order that the concrete above and below the-plate may be'uni ted through said openings and not be separated. v

In Figs. 4 and 5 I show a base member 16 oi acircular form and in which the sockets 17 project vertically from said circular pl ate. Figs. 6 and 7 show a base from which a single socket projects, while Figs. 8 and 9 illustrate a rectangular base 18 with a central opening 19 and a socket 20 at each endthereof.

' In Figs. 11 and 12 I show a form in which the base 21 is formed integrally with the col.- umn-rod 7. In the formation of this base the lower end of the column is increased in size or area-by being upset, so as to form a broad flat base on which the rod may rest in "bedded and extending vertically therein, a

base also embedded in said concrete, said base having a socket to receive said rod whereby the load of'the rod may be distributed over the concrete.

3. A concrete column having a vertical rod embeddedtherein, and a base of greater area than the area of the rod and having a tubular socket projecting therefrom, said socket serving to receive the'end of the rod.

4. A concrete column having a plurality of vertical rods embedded therein, a single base having a plurality of sockets projecting vertically therefrom, said sockets being of greater diameter than the rods and serving to receive the latter. 1

5. A concrete column havinga plurality of vertical rods embedded therein, a single baseplate having a greater area than the cross sectional area of all the rods combined and also having an opening extending therethe ends of the rods. 6. A concrete column having a plurality of vertical rods, one above the other and said rods being embedded in said concrete and a plate resting on top of the lower rod and receiving the load of the upper rod and serving to concentrate the load from the concrete to the lower rodf 7. A concrete column having vertical rods arranged one above the other and said rods being embedded in said concrete and a plate interposed between. the'adjacent ends of said. rods and having sockets projecting at opposite sides tl'iereoi' whereby the upper end of the lower rod and the lower end of the up per rod may enter'said sockets and the load of the concrete be concentrated'on the rods. In testimony whereof I aflix my signature in presence of two witnesses.

LAYTON F, SMITH.

Witnesses: I

G. FERDINAND Voonr, CHARLES B. MANN, Jr. 

